Free editor for PDF documents. Complete editing of PDF documents is possible with PDFedit. You can change raw pdf objects (for advanced users) or use many gui functions. Functionality can be easily extended using a scripting language (ECMAScript).

gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms.

Jahshaka is a video and film compositing, editing and special fx system that uses OpenGL & OpenML hardware rendering to give operators real time interactivity. The system is cross platform, and also includes full CG, paint and image processing modules.

NOTE: FontForge has moved to fontforge.github.io, newer binaries and sources are available at github.com/fontforge.
FontForge allows you to edit outline and bitmap fonts. You may create new ones or modify old ones. It is also a format converter and can interconvert between PostScript (ascii & binary Type1, some Type3, some Type0), TrueType, OpenType (Type2), CID, SVG

Geeqie is a lightweight image viewer. It was forked from GQview. The development is focused on features for photo collection maintenance: raw format, Exif/IPTC/XMP metadata and integration with programs like UFraw, ImageMagick, Gimp, gPhoto or ExifTo
The current development can be found on Gitouris (https://gitorious.org/geeqie)

ConversionSVG is a Windows GUI that controls the way Inkscape exports SVG files to PNG, EPS, PS and PDF file formats. The software also handles efficiently batch conversion and it comes with a Wizard to helps beginners.

LProf is an open source color profiler that creates ICC compliant profiles for devices such as cameras, scanners and monitors. Origanally authored by Marti Maria the creator of LCMS. Marti has graciously consented to the creation of this project.

Eloquent is a powerful Bible study tool for Mac OS X, supporting features such as services, to access the Bible in any program. It uses the Sword Library to work with bible texts, commentaries, dictionaries.

retypar converts photos, drawings etc. into text. The result can be saved as text (.txt, .ans), HTML (.html) or as an image (.jpg). You can influence the conversion by altering certain options (font, font size, scale factor, colour etc.).

A Java library for loading, editing, analyzing and saving pixel image files.
Java 1.1 or higher is required.
Various file formats are supported, demo applications for the command line
and the AWT GUI toolkit are provided.

Y.A.P.R.M. is a free-as-in-freedom modeller to graphicaly design 3d scenes and generate POV-Ray-files for them. Appart from the basic POV-Ray objects which can be used in CSG operations it supports spline based objects. Furthermore a vast amount of 3d-files can be imported and used with Y.A.P.R.M.